A movable type shield launching device for a narrow and small space comprises a launching rack, a reaction frame, horizontal supports and a base ring. The launching rack is fixed to a launching well bottom plate. Lateral longitudinal beams are fixed to the two sides of the launching rack separately. The lateral longitudinal beams on the two sides are each provided with at least one row of positioning bolt holes. The reaction frame is connected with any of the positioning bolt holes in the lateral longitudinal beams on the two sides through bolts, so that the reaction frame is perpendicularly and detachably fixed to the lateral longitudinal beams on the two sides. An irregular-shaped ring plate is fixed to the reaction frame. The base ring is arranged in front of the reaction frame in a spaced mode. The horizontal supports are evenly distributed between the reaction frame and the base ring in the ring direction, and the two ends of each horizontal support are fixed to the irregular-shaped ring plate and the base ring separately, so that the reaction frame, the horizontal supports and the base ring form a whole. According to the movable type shield launching device for the narrow andsmall space, assembly of ring loading pipe segments is not needed, construction cost is reduced, the construction period is shortened, and an enough operation space can be provided for shield materials and soil discharging in the narrow and small space.